Process of making ophthalmic mountings



Nov. 30 1926.

N. M. BAKER ET AL PROCESS OF MAKING OPHTHALMIC MOUNTINGS Original i166.001;. 2 1923 951, QV /W- r 8 gnuzn mo FRANK FRASER. NELSON M. BAKER.

Patented v. 30, 1926.

UNITED STATES PATENT; OFFICE.

NELSON M. BAKER, OF SOUTHBRIDGE, MASSACHUSETTS, AND FRANK FRASER, OFTOLEDO, OHIO, ASSIGNORSTO AMERICAN OPTICAL COMPANY, OF SOUTHBRIDGE,

MASSACHUSETTS, A VOLUNTARY ASSOCIATION OF MASSACHUSETTS.

PROCESS OF MAKING OPHTHALMIC MOUNTING-S.

Original application filed October 25, 1928, Serial No; 670,678. Dividedand this application .fl led flay 9,

A 1825. Serial 'No. 29,080.

The present invention relates to an im- 7 proved ophthalmic mounting andprocess or method of constructing the same, and has particular referenceto ophthalmic mountings of that class that are formed or chiefly formedfrom the so-called zyl or other form An important object of ourinvention is to providean ophthalmic mounting of the dharacter describedand a method or process of constructing the same whereby the amount ofmaterials that have heretofore beenwasted. will now be saved, thuscausing a great saving in-time and e xpense'to the manufacturer of suchmountings.

Another very important object of the invention is to provide anophthalmic mounting'of the character described and method or process offorming the same whereby the eye pieces, bridge, and end pieces will beformed separately and then united to form a completed mounting or blank,thus making it possible to make the eye pieces,

bridges and end pieces in large quantities and assembling thevariouspieces with the desired sized other pieces.

Another important object of the invention is to provide an ophthalmicmounting of this nature and process or method of making the same whereinthe eye pieeesmay be provided with substantial reinforcing means toprevent any warping thereof.

Another important object of the invention is to provide an ophthalmicmounting of this nature and. the method or process of forming the samethat will be strong, durable, very simple and inexpensive to manufacturep Other objects, and advantages of the invention will become apparentduring the 4 courseof the following description:

In the drawings, wherein like numerals are employed I to designate likeparts throughout the same:

Figure 1 is a front elevation of the finished'opht-halmicmounting in anassembled condition.

Fi ure 2 is a fronte levation of-a mountlng s owing thevarlous partsdlsassociated. Figure 3 1s a transverse vertical section showing themethod of forming the eye showing the tube stock provided with rein'forcing means before it has been shaped. Figure 6' is a view of thesame after it has been shaped.

Figure ofda'nother form of ophthalmic mounting, an

i" is a fragmentary front elevation Figure 8 is a section taken on line88' thereof.- q e In the drawings, wherein for the purpose ofillustration is shown the preferred embodiment of the same, the numeral10 in Figure 3 designates a length of tubular stock formed frompreferably. a cellulose composition material. The tubular stock is madesomewhat pliable whereupon a roller 11 is forced downwardly and rolledalong the same until the stock assumes the shape as shown in Figure 4.After the stock has beenshapecLas in Figure 4, it may be wound around asuitable mandrel until it has properly set up, after which it may be cutso as to form an eye piece,

as is designated by the numeral 12. {This eye piece 12 will have thedesired groovemr lens seat and will at the same time have the propercurvature as at 13. thus doing away with a great deal of milling thathas heretofore been required. The ends may be tube, whereby the tubewill assume a position as shown inFigure 6, thusforming a lens seat 18similar to the seat 19 in Figure 4, except that it is angular instead ofround. The tube stock as is shown in Figure 6, is shaped and cut asshown in Figure 4, thus forming an eye piece 12 which may or may not bereinforced by the metallic member 15, as may be desired for theparticular purposes for which it is used. After the rings 12 have beenformed the bridges 20 and end pieces 21 may be formed and suitable sizedones are selected and cemented to the eye pieces.

It is preferred that the joint, as at 14:, will be arranged so that theend piece 21 will overlie both ends thereof so as to give additionalstrength to the finished product. The bridge 20 will be cemented as at22 while the end pieces will be cemented as at 23. Of course, variousmethods may be employed and devised to insurev perfect alignment of thebridge and end pieces with respect to the eye pieces, so that we do notwish to limit ourselves to any one particular method. It will be seenthat a small or large bridge 20 may be used with the eye pieces so thatany combinations may be had by such a construction. The metallicreinforcing member 15 will be. found exce tionally desirable in theso-called. all zyl fi'ames, as this memher will prevent warping of theframe and willthereby increase the life thereof.

In Figure 7 the ring 24 is placed over a metallic frame 25, as is shownin Figure 8, thus the ends 26 will not be cemented to T each other, asat 14, but will be secured in the usual manner. In this instance it willnot be necessary or desirable in most cases to provide the reinforcingelement 15, but the ring is formed by the method shown in Figfures 3 and4 will be placed over the metallic ring 25.

By forming an ophthalmic mounting in this manner considerable stock 1ssaved, and

as the composition used is a very expensive one, such am item is veryimportant. F urthermore, the time involved will be greatly reduced as anumber 'ofthe milling and grooving operations will be obviated, and

the rings will be formed from tube stock in one or two operations. A

. It is to be understood that the form of our invent'on herewith shownand described is to be ta lren as the preferred embodiment of the sameand that various changes in the shape, size and arrangement of parts maybe resorted to without departing from the spirit of the invention or thescope of the subjoincd claims.

Having thus described claim:

1. The process of forming an ophthalmic eye piece of the characterdescribed comprising rolling tube stock to form a groove therein,wrapping the same so as to form a ring, and cementing the free ends ofsaid ring.

2. The process/of forming an o hthalmic eye piece of the characterdescribe comprising making a piece of round stock pliable, rolling thesame to form a. groove therein, wrapping the stock so as to form a ring,allowing the ring to set up, and cementing the free ends thereof.

3. The process of forming an ophthahnic mounting of the characterdescribed consisting of rolling a cellulose tube to form a seat therein,and Wrapping the tube into a ring, and joining its ends.

4. The process of forming an ophthalmic mounting consisting of rollingtube stock to form grooves therein, wrapping the stock into rings andcementing their ends and our invention, we

joining a bridge and end pieces to said, "rings. Y

NELSON M. BAKER. FRANK FRASER.

